"Since the word 'jazz' was a neologism in 1915, the writer can be excused for not making the same associations with it as you do."

The Indianapolis _Freeman_ began writing about "blues" music 63 months before that article. Before that article was published, more than 30 "Blues" tunes were published and/or copyrighted (all 30 of them after Maggio had already heard black guitar blues on a levee). If someone told that writer in 1915 that "jass band" and "blues band" meant the same thing in 1915 -- and perhaps some person up in _Chicago_ did say that -- on other evidence that person seems to have been wrong.